A (or SSL termination proxy, or SSL offloading) a proxy server that acts as an intermediary point between client and server applications, and is used to terminate and/or establish TLS (or DTLS) tunnels by decrypting and/or encrypting communications.

(DoT) a network security protocol for encrypting and wrapping Domain Name System queries and answers via the Transport Layer Security protocol.

The Transport Layer Security protocol provides the ability to secure communications across or inside networks.

Opportunistic TLS (Transport Layer Security) refers to extensions in plain text communication protocols, which offer a way to upgrade a plain text connection to an encrypted (TLS or SSL) connection instead of using a separate port for encrypted communication.

(previously PolarSSL) an implementation of the TLS and SSL protocols and the respective cryptographic algorithms and support code required.

(formerly known as SSL acceleration) a method of offloading processor-intensive public-key encryption for Transport Layer Security and its predecessor Secure Sockets Layer to a hardware accelerator.